| 3113 Effectiveness of Technique Demonstrations on Enamel Bond Strength | ||
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S.A. ANTONSON1, M. SHU2, D. ANTONSON1, and P. HARDIGAN1, 1Nova Southeastern University, Fort Lauderdale, FL, USA, 2Nova Southeastern University, Ft. Lauderdale, FL, USA Objective: To compare the enamel shear bond strengths of one-bottle dual component bonding agent and one-step self-etching bonding agent, bonded by experienced practicing dentists and first year dental students, before and after bonding technique demonstrations. Methods: One hundred and twenty eight extracted human posterior teeth were embedded in resin. Flat surfaces of 3 mm in diameter were exposed on enamel by grinding the surface with 70 grit size trimmer. Two independent dentists had at least ten years of experience in general dentistry and two first year dental students prepared bonding of a hybrid composite (Filtek Supreme, 3M/ESPE) with Adper Single Bond (SB) and Adper Prompt-L-Pop (PP) (3M/ESPE) through a Teflon split-mold of 2.5 mm in diameter (n=16 per group). After a technique demonstration, the operators repeated the same bonding procedure. Shear bond test was performed with Tinius Olsen Locap Testing Machine (Willow Grove, PA) at a cross-head speed of 0.1 mm/min. A univariate analysis of variance was conducted; Tukey's-HSD was applied to all multiple comparisons. Results: Results of the ANOVA indicated statistical differences (P<.001). The post-hoc tests revealed the following: Shear bond strength levels (MPa, Mean and SD) as indicated by a, b, and c, and not connected by same letter are significantly different: Dentists-before demo- SB 21.9 (8.2)a; Dentists-before demo-PP 13.7 (8.1)b,c; Students-before demo-SB 21.3 (9.7)a,b; Students-before demo- PP 11.4 (4.4)c; Dentists-after demo-SB 24.0 (6.2)a; Dentists-after demo-PP 18.2 (5.7)a,b,c; Students-after demo-SB 25.5 (5.9)a; Students-after demo-PP 17.8 (5.5)a,b,c; SB 23.3 (7.5)a; PP 15.2 (6.6)b,c. Conclusion: There was no statistical difference in enamel shear bond strengths between dentists and students, and before and after demonstrations. Enamel shear bond strengths of Adper Single Bond were significantly higher than that of Adper Prompt-L-Pop. 3M/ESPE has provided support for this study. | ||
| Seq #335 - Adhesion III 10:15 AM-11:30 AM, Saturday, 13 March 2004 Hawaii Convention Center Exhibit Hall 1-2 | ||
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